<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>02_动态改变组件内容</title>
</head>

<body>
    <div id="app"></div>
    <script src="../js/react.development.js"></script>
    <script src="../js/react-dom.development.js"></script>
    <script src="../js/babel.min.js"></script>
    <script type="text/babel">
        function MyComponent(){
            return <h2>现在是 {new Date().toLocaleTimeString()}</h2>
        }
        // 每隔一秒执行一次ReactDOM.render方法
        setInterval(()=>{
            ReactDOM.render(<MyComponent/>,document.getElementById("app"))
        },1000)
    </script>
</body>

</html>